{ INFORMATICS.MCCME.RU
  Problem statement: http://informatics.mccme.ru/moodle/mod/statements/view3.php?chapterid=1451
  Verdict: Accepted
}
uses SysUtils, Math;
 
var
	a,b,c:int64;
 
begin
reset(input,'input.txt');
rewrite(output,'output.txt');
read(a,b,c);
if (odd(a) or odd(b) or odd(c)) and ((not odd(a)) or (not odd(b)) or (not odd(c))) then write('YES') else write('NO');
end.
 
begin
reset(input,'input.txt');
rewrite(output,'output.txt');
read(A);
write(inttoroman(a));
end.